JP3415518B2 - Motor driven bell - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-driven bell for striking a gong by a motor-driven striking rod to emit a bell sound.

[0002]

2. Description of the Related Art A conventional motor drive bell will be described below with reference to the drawings. 20 is a view of the conventional motor drive bell as viewed from the back side of the gong 30, and FIG. 21 is a view of the inside of the gong 30 as seen through the HH line side of FIG. 20 and 21, reference numeral 31 is a housing that houses the motor 32, and is attached to the inner surface of the gong 30.

The motor 32 is connected to a power source (not shown) through a predetermined switch or the like, and its drive shaft 3
The cam member 33 attached to 2s is rotated. The cam member 33 is an elliptical plate-shaped member, and is attached to the drive shaft 32s at an angle as shown in the drawing. Reference numeral 34 is a leaf spring, which is attached to a predetermined position of the housing 31 so that the extending piece 35 at the tip thereof comes into contact with the cam member 33 (see the dotted line portion in FIG. 21). The extension piece 35 is a portion that extends toward the drive shaft 32s perpendicularly to the longitudinal direction of the leaf spring 34, and has a semicircular contour that is convex toward the side surface 33a of the cam member 33. ing. Reference numeral 36 is a striking rod that strikes the gong 30, and is fixed to a predetermined position of the leaf spring 34.

In such a structure, when the motor 32 is driven, the drive shaft 32s is rotated and the cam member 33 is rotated.
The extension piece 35 receives a thrust force via the, and a force for pressing the leaf spring 34 is generated. As a result, the striking rod 36 reciprocates,
The gong 30 is struck to generate a bell sound.

[0005]

By the way, in the above-described motor drive bell, although a constant rated voltage is set for the power source, the power source voltage at each installation location is undefined, and the rated voltage is not fixed. Since the voltage is often higher than the voltage, the rotation of the cam member 33 by the motor 32 becomes faster, and the force acting on the leaf spring 34 becomes stronger, so that the leaf spring 34 becomes stronger.
There is a strong tendency to twist. Therefore, in actual use, the striking rod 36 may reciprocate while swinging greatly in the left-right direction in the figure as shown in FIG. 22, so that the leaf spring 34 may deform with use and cause a change in performance.

On the other hand, it is customary that a large number of motor-driven bells of this type are installed in a building or the like, and all of them are operated simultaneously when an emergency occurs. Therefore, if the drive current in each motor drive bell is large or unstable, the overall current becomes larger and more unstable, resulting in increased power consumption, damage to the power supply unit, and motor drive bell. This may lead to various adverse effects such as performance change or operation stop. For this reason, in the motor drive bell, it is extremely important to reduce and stabilize the drive current.

However, as described above, when the motor 32 is driven by an excessive voltage and the striking rod 36 reciprocates while swinging greatly, the edge of the extending piece 35 (reference numeral 35a in FIG. 22) is located on the side surface 33a. The resulting overload causes a sharp increase in drive current, as there is a risk of a piercing contact. Therefore, the conventional motor drive bell also has a problem that it is difficult to sufficiently secure the reduction and stabilization of the drive current.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a motor drive bell that does not cause a problem such as a change in performance due to deformation of a leaf spring.
Another object of the present invention is to provide a motor drive bell capable of ensuring an appropriate reciprocating direction of the hitting rod and reducing and stabilizing the drive current.

[0009]

According to a first aspect of the present invention, there is provided a motor driving bell, wherein a gong which emits a bell sound when the inner surface is hit, a housing mounted on the inner surface, and a motor housed in the housing. And a striking rod for striking the inner surface by the driving force of the motor, wherein the striking rod is supported by a guide member fixed to the housing so as to be linearly movable in the axial direction thereof, A cam having a deviation axis, which is substantially parallel to the axis of the motor and shifted in a direction perpendicular to the axis, is fixed to the drive shaft of the motor, and the rotational movement of the deviation axis is provided between the striking rod and the deviation axis. Dabo driving force transmitting member for converting the linear motion provided et al is the driving of the motor
The striking rod when it is extended is straight due to the support of the guide member.
Only the movement is performed to strike the inner surface of the gong . According to the motor drive bell of the first aspect, when the motor is driven, the cam rotates together with the drive shaft. At this time, the deviation axis of the cam makes an orbital movement around the axis of the drive shaft, and transmits power to the striking rod supported by the guide member so that only linear movement can be performed through the drive force transmission member. . As a result, the striking rod makes a linear reciprocating movement along with the rotational movement of the cam to strike the inner surface of the gong and generate a bell sound.

According to a second aspect of the present invention, there is provided the motor drive bell according to the first aspect, wherein the driving force transmitting member is an elastic body. According to the motor drive bell of the second aspect, the impact when the striking rod strikes the gong and the variation of the linear momentum of the striking rod due to the variation of the driving force of the motor are absorbed by the elastic deformation of the elastic body.

The motor drive bell according to a third aspect is the motor drive bell according to the second aspect, wherein the elastic body is a spring, and a coil-shaped winding portion wound around the deviation shaft is provided at one end thereof. And the end of the coiled winding is longer than the portion in contact with the cam. According to the motor drive bell of the third aspect, since the length of the end of the coiled winding portion is made longer than that of the portion in contact with the cam, the tip of the end in operation is the portion in contact with the cam. Since it does not come into contact with, it does not get caught or rub.

According to a fourth aspect of the present invention, there is provided a motor driving bell according to the third aspect, wherein the end of the striking rod facing the spring has a through hole that is substantially parallel to the axis of the drive shaft. Is formed, at the end of the spring opposite to the side where the coiled winding portion is formed,
A ring portion that is inserted into the through hole is formed, and the spring is tiltable around the axis of the through hole with respect to the striking rod. According to the motor drive bell of the above-mentioned claim 4, since one end of the spring for reciprocating the hitting rod by driving the motor is wound around the deviation axis of the cam, the spring tilts with respect to the axis of the hitting rod. Since this spring is connected to the striking rod so as to be tiltable, there is a risk that the spring will bend and this bending force will be applied to the striking rod, as compared to the case where both are fixed and cannot be tilted. In addition, the reciprocating motion of the striking rod can be further stabilized. Further, since the spring is attached to the hitting rod only by passing the ring portion of the spring through the through hole of the hitting rod, the assembly can be performed easily and in a short time.

A motor drive bell according to a fifth aspect is the motor drive bell according to any one of the first to fourth aspects, wherein the mounting position of the motor on the housing is adjustable in the axial direction of the striking rod. It is characterized by being. According to the motor drive bell of the fifth aspect, the position of the striking rod with respect to the inner wall surface of the gong to be struck is adjusted by moving the mounting position of the motor in the axial direction of the striking rod.

A motor drive bell according to a sixth aspect is the motor drive bell according to the fifth aspect, wherein a motor case for accommodating the motor is provided in the housing, and one of the motor case and the housing is provided. On the other hand, a fitting groove that is substantially parallel to the reciprocating direction of the striking rod is formed, and on the other side, a fitting protrusion that fits the fitting groove is formed. The position of the striking rod in the axial direction is adjusted by slidingly moving the motor case with respect to the housing in a state of being fitted. According to the motor drive bell of the sixth aspect, in the state where the fitting groove and the fitting projection are fitted, the motor case housed in the motor case is slid with respect to the housing using the fitting as a guide. By doing so, the motor housed therein is also slid, and the position of the striking rod with respect to the inner wall surface of the gong to be hit is adjusted.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a motor drive bell of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the motor drive bell has an inner surface 1
The gong 2 that emits a bell sound when hit by, the housing 3 attached to the inner surface 1 of the gong 2, the motor 4 housed in the housing 3, and the inner surface 1 by the driving force of the motor 4. It is roughly composed of a hitting rod 5 for hitting.

The striking rod 5 is a substantially columnar member for striking the gong 2, and is supported by a guide member 6 fixed to the housing 3 so as to be linearly movable in the axial direction.
Further, a cam 9 having a deviation axis 8 which is substantially parallel to the axis of the motor 4 and which is shifted in the vertical direction from the axis is fixed to the drive shaft 7 of the motor 4. Then, the hitting bar 5 and the deviation axis 8
A drive force transmitting member 10 for converting the rotational movement of the deviation shaft 8 around the drive shaft 7 into the linear movement of the striking rod 5 is provided between and. The gong 2 has a circular dish shape, and has an inner surface 1 having a substantially flat central portion. As shown in FIG. 2, the inner surface 1 of the gong 2 has a curvature increasing from the central portion to the outer portion, and the outer peripheral side wall 2a located on the outer periphery.
In, it is formed so as to be substantially vertical to the central portion. Then, as shown in FIG. 2, a housing attachment portion 2b, which is a place where the housing 3 is attached, is formed in the central portion thereof.

The housing 3 comprises a storage frame 12, a lid and packing (not shown), and three assembly screws. The storage frame body 12 is formed with a frame-shaped peripheral edge joint portion 12a which is a portion to be joined when the lid body and the packing are attached, and a concave portion 12b from the peripheral edge joint portion 12a toward the gong 2 side. It is a storage container.
Further, the storage frame 12 has a female screw 12c into which the assembly screw is screwed when the lid and the packing are attached.
Are formed at three locations. The lid body is a plate body that covers the opening of the storage frame body 12, and three through holes for passing the attachment screws are provided in accordance with the positions of the female screws 12c (not shown). The packing is a resin packing which is sandwiched between the lid and the peripheral joint 12a for the purpose of drip-proof, and like the lid, is aligned with the position of the female screw 12c of the storage frame 12. Three through holes are provided (not shown).

The motor 4 is connected to a power source via a predetermined switch (not shown) or the like, and rotates a cam 9 attached to the drive shaft 7. The motor 4 is, as shown in FIG. 1, provided with a recess having a predetermined shape for housing this, in a state where the pair of long holes 13a is housed in the motor case 13 formed, accommodating frame 12 It is fixed inside by two mounting screws 14A. Each long hole 13a is a through hole long in the linear movement direction of the striking rod 5. The mounting position of the motor 4 on the housing 3 can be adjusted in the axial direction of the striking rod 5 for each motor case 13 by loosening the mounting screw 14A.

That is, as shown in FIGS. 3 and 4, four parallel fitting protrusions 13b are formed on the joint surface 13a1 of the motor case 13 with the housing frame 12, while the housing frame is provided with Bonding surface 1 of the body 12 to which the bonding surface 13a1 is bonded
Two fitting grooves 12f that are substantially parallel to the reciprocating direction of the striking rod 5 are formed in 2e. The fitting frame 12f and the fitting projection 13b are fitted to each other, and the storage frame 12 is By sliding the motor case 13 with respect to the hitting rod 5,
The axial position adjustment of is adjusted within the range of the dimension L '. After adjusting the mounting position, the mounting screw 14A is tightened again to fix the motor 4 together with the motor case 13 so that the motor 4 cannot move relative to the housing 3.

As shown in FIGS. 5 and 6, a cam 9 is fixed to the drive shaft 7 of the motor 4, and a deviation shaft 8 of the cam 9 has a deviation shaft 8 which is an elastic body and a driving force transmitting member 10 which is a spring. A coil-shaped winding portion 10a provided at one end of is wound rotatably. The length L of the distal end 10b of the coil-shaped winding portion 10a is longer than the portion where it comes into contact with the cam 9, and is projected toward the outside. The striking rod 5 is fixed to the other end of the driving force transmission member 10.

The cam 9 is made by adhering two disc members 14 and 15 which are resin molded products shown in FIGS. 7 to 10 to each other by adhesion or welding. In the disk member 14,
The deviation axis 8 having a circular shape is integrally formed in a state where the center of the deviation axis 8 is deviated from the line of sight of FIG.
Two short protrusions 14b and one long protrusion 14c, which is thicker and longer than the short protrusion 14b, are formed in a in a state of protruding vertically outward. Further, at the center of the disc member 14, a drive shaft hole 14d through which the drive shaft 7 is passed is formed. Deviation axis 8 shown in FIG.
The thickness t is for forming a gap width between the disk member 14 and the disk member 15 when they are bonded to each other, and the coiled winding portion 10a attached thereto can freely rotate. It has the minimum and sufficient dimensions necessary for.

The disc member 15 shown in FIGS. 9 and 10 has the same outer diameter as the disc member 14, and a drive shaft hole 15a having the same inner diameter as the disc member 14 is formed at the center thereof. Further, the disk member 15 is formed with a centering hole 15b and a through hole 15c into which the short projections 14b and the long projections 14c are respectively inserted when the drive shaft hole 14d and the drive shaft hole 15a are bonded together. Has been done. In addition, each short protrusion 14b and each centering hole 15b
Is for centering by perfectly matching the relative positions of the drive shaft hole 14d and the drive shaft hole 15a, and the long protrusion 14c and the through hole 15c receive torque when the cam 9 is rotationally driven. It is for.

As shown in FIG. 11, the driving force transmission member 10
Is a coiled winding portion 10a attached to the deviation shaft 8.
A linear portion 10d having a linear shape, a spring coil portion 10e having a coil shape, and a ring portion 10f formed in an annular shape.
It consists of As shown in FIGS. 5 and 6, with respect to the ring portion 10f, the driving force transmission member 10 of the striking rod 5 is provided.
A through hole 5a that is substantially parallel to the axis of the drive shaft 7 is formed at the rear end of the side facing the (spring). The ring portion 10f is inserted into the through hole 5a, and the driving force transmitting member 10 is inserted into the through hole 5a with respect to the striking rod 5.
It is freely tiltable around the axis. With this configuration,
The driving force transmitting member 10 for reciprocating the striking rod 5 by a motor is tilted with respect to the axis of the striking rod 5 because one end of the driving force transmitting member 10 is wound around the deviation shaft 8 of the cam 9. Since the driving force transmitting member 10 is bent and the bending force is not applied to the striking rod 5, the striking rod 5 has a structure in which the driving force transmitting member 10 is bent, as compared with the case where the both are connected and fixed so as not to tilt. It is possible to further stabilize the reciprocating motion of No. 5. Further, since the driving force transmission member 10 is attached to the striking rod 5 only by passing the ring portion 10f of the driving force transmission member 10 through the through hole 5a of the striking rod 5, the assembly can be performed easily and in a short time. It will be possible.

The mounting of the driving force transmission member 10 to the striking rod 5 is not limited to the structure in which the ring portion 10f is passed through the through hole 5a, and other mounting structure is adopted as shown in FIG. 12, for example. Is also good. That is, the driving force transmission member 10 of the example of FIG. 12 includes a coiled winding portion 10a attached to the deviation shaft 8, a linear straight portion 10d,
It is similar to the above in that it is provided with a coil-shaped spring coil portion 10e, but instead of the ring portion 10f, the spring coil portion 10e has a tapered outer diameter at the tip thereof. A part 10c is formed, and the striking and fixing part 10c is provided with a striking rod 5
A protrusion 5b formed on the rear end and having an outer diameter larger than the inner diameter of the tightening and fixing portion 10c is fixed. In this structure, the driving force transmitting member 10 is attached to the striking rod 5 by inserting the projection 5b of the striking rod 5 into the fastening fixing portion 10c of the driving force transmitting member 10 and pushing it in the axial direction. As a result, the protrusion 5b is tightened by the tightening fixing portion 10c, so that the striking rod 5 is fixed to the driving force transmission member 10 so as not to be pulled out.

In each of the driving force transmitting members 10 shown in FIGS. 11 and 12, the spring coil portion 10 is used.
e is an elastic body, so sudden load is applied,
When the striking rod 5 is about to move excessively, it acts as a cushioning member for cushioning those impacts.

The guide member 6 shown in FIGS. 13 and 14 is
A generally cylindrical shape of the resin molded article, in its interior, has an inner diameter slightly larger than the outer diameter of Dabo 5 so Dabo 5 is freely linear motion in its axial 15A direction is inserted into the shaft 15A coaxially A guide hole 6a is formed. At one end of the guide member 6, there is formed a flange-shaped locking portion 6b which projects outwardly in the outer diameter direction by a width t1 around the shaft 15A . Further, a fitting groove 6c into which a locking member 16 to be described later is fitted is provided on the outer surface of a portion retracted from the locking portion 6b in the direction of the shaft 15A by a length L1 so as to be perpendicular to the shaft 15A. Is formed in. Furthermore, on the opposite side of the fitting groove 6c with respect to the axis 15A is, detent projections 6d are formed in the axial 15A direction is an elongated projection. The anti-rotation protrusion 6d is for positioning and preventing rotation when the guide member 6 is fixed to the housing 3, and the storage frame 1
The groove 2d is formed in the groove 2 with which the detent 6d engages. Locking member 16 shown in FIGS. 15 and 16.
Is a resin molded product having a gate shape, and its thickness is
It is dimensioned to fit in the fitting groove 6c without slack. Further, the separation width W in the line of sight of FIG. 15 has a size that substantially matches the outer diameter of the guide member 6.

Next, an assembling method of the motor drive bell composed of the above-described components will be described below with reference to FIG. First, the ring portion 10f of the driving force transmitting member 10 is passed through the through hole 5a of the striking rod 5, whereby the striking rod 5 is driven.
The driving force transmission member 10 is attached to the. Then, the disc member 14 and the disc member 15 are adhered to each other with the coil-shaped winding portion 10a rotatably attached to the deviation shaft 8 to assemble the cam 9. The drive shaft 7 of the motor 4 is pushed and fixed in the drive shaft hole 14d and the drive shaft hole 15a of the cam 9 assembled in this way. At this time, since the inner diameters of the drive shaft hole 14d and the drive shaft hole 15a are made smaller than the outer diameter of the drive shaft 7, the drive shaft 7 after being fitted into the drive shaft hole 14d and the drive shaft hole 15a.
A pressure force is applied to generate a frictional force. Therefore,
The cam 9 is fixed so as to be integral with the drive shaft 7.

In the housing frame 12 of the housing 3,
The guide member 6 is mounted in the cut 12f such that the locking portion 6b thereof faces the outside and the rotation preventing projection 6d is engaged with the groove 12d of the cut 12f formed in the storage frame 12. Then, the locking member 16
Is positioned so that its thickness direction is parallel to the shaft 15A and above the fitting groove 6c, and the guide member 6 is attached so as to sandwich the guide member 6 from the state in which the lower side is open. As a result, the wall portion near the notch 12f of the storage frame 12 is sandwiched between the locking member 16 and the locking portion 6b, so that the guide member 6 is fixed in the direction of the axis 15A without rattling. . This storage frame 12 is a gong 2
It is fixed to the housing mounting portion 2b of.

Next, the motor 4 and the cam 9 assembled above
After passing the striking rod 5 of the unit including the driving force transmitting member 10 and the striking rod 5 into the guide groove 6a of the guide member 6,
The motor 4 is pressed into the housing frame 12 by the motor case 13, and in this state, it is fixed by the two mounting screws 14A. Then, after the electric wiring of the motor 4 is connected (not shown), the packing is placed on the peripheral edge joint 12a so that its shape matches, and then the packing is sandwiched by the lid. The assembly is completed by fixing with the assembly screw. The lid body covers the concave portion 12b of the storage frame body 12 to perform a drip-proof action, and at the same time, the locking member 16
Also has a role of pressing down and fixing the guide member 6 from the disengagement from the guide member 6.

Next, the operation of the motor drive bell having the above structure will be described below with reference to FIGS. 18 and 19. First, the motor 4 is driven to drive the drive shaft 7.
When the cam 9 is rotated together therewith, the deviation shaft 8 makes an orbital movement around the axis of the drive shaft 7. Then, power is transmitted to the striking rod 5 supported by the guide member 6 so that only linear movement can be performed, via the driving force transmission member 10. As a result, the striking rod 5 makes a linear reciprocating motion along with the rotating motion of the cam 9, and strikes the inner surface 1 of the gong 2 by repeating the states of FIGS. 18 and 19 to generate a bell sound.

At this time, the impact of the striking rod 5 striking the gong 2 and the variation of the linear momentum of the striking rod 5 due to the variation of the driving force of the motor 4 are caused by the spring coil portion 10 which is an elastic body.
It is absorbed by the elastic deformation of e. Further, as described above, by making the length L of the distal end 10b of the coiled winding portion 10a longer than the portion in contact with the cam 9, as shown in FIGS. 18 and 19, the distal end 10b during operation is , Its tip 10f does not come into contact with the contact portion with the cam 9,
It does not get caught or rub. If the bell sound needs to be adjusted, the mounting screws 14A are loosened and the position of the motor 4 in the direction of the shaft 15A is adjusted for each motor case 13. In this case, after the position adjustment, the mounting screw 14A is tightened again to fix the motor 4 to the storage frame 12.

As described above, the driving force transmitting member 10 connects the cam 9 and the striking rod 5 and converts the orbital movement of the deviation shaft 8 into the linear movement of the striking rod 5. In order to perform such a function, a shaft having rigidity and having rotary free joints at both ends thereof is used, and the cam 9 and the striking rod 5 are connected (not shown) via the shaft, thereby providing a piston crank mechanism. May be assembled, and it is not always necessary to use an elastic body such as the spring coil portion 10e. However, in the present motor drive bell, by using the spring coil portion 10e which is an example of an elastic body as such means, in addition to the above-mentioned functions, it has a function of softening a sudden load and smoothing the movement of the striking rod 5. is doing. That is, by providing an elastic body in the power transmission path that can temporarily and suddenly absorb unexpected changes, the shock caused by a sudden load or a large movement of the striking rod 5 is softened, and the striking rod 5 always reciprocates smoothly. To do so.

As described above, according to the motor drive bell of this embodiment, the leaf spring 34 has a structure which does not use the leaf spring 34 as described in the prior art.
It is possible to provide a motor drive bell that does not cause a problem such as a change in performance due to deformation of the. Further, since an appropriate linear reciprocating motion of the striking rod 5 is ensured, it is possible to provide a motor drive bell which is stable in operation and can reduce or stabilize the drive current. Further, by adopting the driving force transmitting member 10 including the spring coil portion 10e, which is an elastic body, the striking force of the striking rod 5 when the striking rod 5 strikes the gong 2 or the driving force of the motor 4 fluctuates. The fluctuation of the linear momentum is absorbed and softened by the elastic deformation of the spring coil portion 10e. As a result, the striking rod 5 can be smoothly reciprocated at all times, and the motor drive bell can be further stabilized with respect to the drive current and the like.

The end 10b of the coiled winding portion 10a
By making the length L of the end longer than the portion in contact with the cam 9, the tip 10f of the distal end 10b in operation does not get caught in the cam 9 or cause friction, and thus the operation can be performed more smoothly. It is also possible to use a motor drive bell that is less likely to change in performance. Also, the motor 4
The position of the hitting rod 5 relative to the inner surface 1 of the gong 2 to be hit is adjusted by moving the mounting position of the hitting rod 5 in the axial direction of the hitting rod 5, so that the position of the hitting rod 5 is adjusted so as to hit the gong 2 appropriately. It is also possible to use a motor-driven bell that can generate a good bell sound.

In the above embodiment, the motor 4
The position of the striking rod 5 is adjusted by moving the position of No. 2. However, the position is not limited to this, and the relative position between the gong 2 and the housing 3 is moved (changed).
By doing so, the position of the hitting bar 5 may be adjusted. Further, in the above embodiment, the driving force transmission member 10 has the spring coil portion 10e, but the driving force transmission member 10 is not limited to this, and may be any elastic body such as a resin molded product having elasticity such as a rubber shaft. You may.

Further, in the above embodiment, the guide member 6 is a separate component from the storage frame body 12, but the configuration is not limited to this, and a configuration in which it is integrally molded with the storage frame body 12 may be adopted. Further, in the above-described embodiment, the disc member 14 and the disc member 15 are assembled by adhering by bonding, but the present invention is not limited to this, and a male screw is formed on one side and a female screw is formed on the other side to form the both. Other joining methods such as joining by screwing may be adopted. In the above embodiment, the coil winding portion 10a of the driving force transmission member 10 is also used.
Is a winding of the extended portion of the straight portion 10d.
The present invention is not limited to this, and a configuration such as a washer shape having a through hole having an inner diameter that can be rotatably fitted in the deviation shaft 8 may be formed at the end portion.

[0037]

According to the motor drive bell of the first aspect of the present invention, since the conventional motor has a structure in which the leaf spring is not used, the motor drive bell does not cause a problem such as a performance change due to the deformation of the leaf spring. It becomes possible to provide the bell. Further, since the appropriate linear reciprocating motion of the striking rod is ensured, the operation becomes stable, and the driving current can be reduced or stabilized.

According to the motor drive bell of the second aspect, by adopting the elastic body as the driving force transmitting member,
The impact of the striking rod when striking the gong and the variation of the linear momentum of the striking rod due to the variation of the driving force of the motor are absorbed and softened by the elastic deformation of the elastic body. As a result, the striking rod can always be smoothly reciprocated, and the driving current and the like can be further stabilized.

Further, according to the motor drive bell of the third aspect, the length of the end of the coiled winding portion is made longer than that of the portion in contact with the cam, so that the operating end is caught by the cam or rubs. Since it can be operated smoothly without causing the above, it is possible to further prevent the performance change.

According to the motor drive bell of the fourth aspect, one end of the spring for reciprocating the striking rod by driving the motor is wound around the deviation axis of the cam. However, since this spring is connected to the striking rod so that it can be tilted, compared to the case where both are connected and fixed so that they cannot tilt,
There is no fear that the spring will bend and this bending force will be applied to the striking rod, and the reciprocating motion of the striking rod can be further stabilized. Furthermore, the attachment of the spring to the hitting bar,
Since the ring portion of the spring is simply passed through the through hole of the striking rod, the assembly can be performed easily and in a short time.

According to the motor drive bell of the fifth aspect, the position of the striking rod relative to the inner surface of the striking gong is adjusted by moving the mounting position of the motor in the axial direction of the striking rod. It is also possible to adjust the position of the striking rod so as to strike appropriately and generate a good bell sound.

According to another aspect of the motor drive bell of the present invention, the motor is housed in the motor case with respect to the housing with the fitting groove and the fitting protrusion fitted together as a guide. By sliding the case, the motor housed in it also slides without changing the relationship between the axial direction of the linear movement of the striking rod and the mounting direction of the motor, and the striking rod against the inner wall surface of the gong is hit. The position of is adjusted. This makes it possible to make adjustments so as to generate a good bell sound.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of a motor drive bell of the present invention, and is a view seen from the back side of a gong.

FIG. 2 is a view showing the motor drive bell and is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing a motor case of the motor drive bell.

FIG. 4 is a view for explaining position adjustment of a hitting rod by slidingly moving a motor case with respect to a housing of the motor drive bell, and is a view of the housing as viewed from the same line of view as in FIG. 1.

FIG. 5 is a view showing components of the motor drive bell, and is a plan view of the assembled striking rod, driving force transmission member, cam, and motor.

FIG. 6 is a view showing components of the motor drive bell, and is a view of FIG. 5 as seen from the line BB.

FIG. 7 is a plan view showing components of the motor drive bell.

8 is a view showing constituent parts of the motor drive bell, and is a cross-sectional view taken along the line CC of FIG. 7. FIG.

FIG. 9 is a plan view showing components of the motor drive bell.

FIG. 10 is a view showing constituent parts of the motor drive bell and is a cross-sectional view taken along the line D-D of FIG. 9.

FIG. 11 is a side view showing components of the motor drive bell.

FIG. 12 is a side view showing a modified example of the mounting structure of the driving force transmission member to the striking rod which is a component of the motor drive bell.

FIG. 13 is a side view showing the components of the motor drive bell.

14 is a view showing the constituent parts of the motor drive bell, and is a view seen from the line EE of FIG. 13. FIG.

FIG. 15 is a view showing components of the motor drive bell and is a front view of a locking member.

16 is a view showing the constituent parts of the same motor drive bell, and is a cross-sectional view taken along the line FF of FIG.

FIG. 17 is a perspective view showing the assembly of the motor drive bell.

FIG. 18 is a view showing the motor drive bell, and FIG.
It is an enlarged view of the G section.

FIG. 19 is a view showing the motor drive bell, and FIG.
It is an enlarged view of the G section.

FIG. 20 is a view showing a conventional motor drive bell,
It is the figure seen from the back side of a gong.

FIG. 21 is a view showing the motor drive bell, and FIG.
It is the see-through figure which looked at a part of gong from the HH line of 0.

FIG. 22 is a front view showing components of the motor drive bell.

[Explanation of symbols]

1 ... inside 2 ... Gong 3 ... Housing 4 ... Motor 5 ... hitting bar 5a ... through hole 6 ... Guide member 7 ... Drive shaft 8 ... Deviation axis 9 ... cam 10 ... Driving force transmission member (elastic body, spring) 10a ... Coil winding part 10b ... end 10f: Ring part 12f ... Mating groove 13: Motor case 13b ... Mating protrusion L ... length

Claims (6)

(57) [Claims] 1. A gong that emits a bell sound when an inner surface is hit, a housing mounted on the inner surface, a motor housed in the housing, and a striking rod that hits the inner surface by a driving force of the motor. In the motor drive bell provided with, the striking rod is supported by a guide member fixed to the housing so as to be linearly movable in the axial direction, and the drive shaft of the motor is substantially parallel to the axial line and A cam having a deviation axis shifted in the vertical direction from the axis is fixed, and a driving force transmission member for converting the rotational movement of the deviation axis into the linear movement of the hitting rod is provided between the striking rod and the deviation axis. al is the Dabo when allowed to drive the motor, the guide portion
The inner surface of the gong by performing only linear movement by supporting the material
Motor driven bell characterized by hitting . 2. The motor drive bell according to claim 1, wherein the drive force transmission member is an elastic body. 3. The motor drive bell according to claim 2, wherein the elastic body is a spring, and a coil-shaped winding portion wound around the deviation shaft is provided at one end of the elastic body. The motor-driven bell, wherein the length of the end of the portion is longer than that of the portion in contact with the cam. 4. The motor drive bell according to claim 3, wherein a through hole that is substantially parallel to an axis of the drive shaft is formed at an end of the striking rod facing the spring. A ring portion that is inserted into the through hole is formed at an end portion opposite to the side where the coiled winding portion is formed, and the spring tilts around the axis of the through hole with respect to the striking rod. Motor driven bell characterized by being free. 5. The motor drive bell according to claim 1, wherein a mounting position of the motor on the housing is adjustable in an axial direction of the striking rod. Motor driven bell. 6. The motor drive bell according to claim 5, wherein a motor case for accommodating the motor is provided in the housing, and the reciprocating motion of the striking rod is provided in one of the motor case and the housing. A fitting groove that is substantially parallel to the direction is formed, and a fitting protrusion to which the fitting groove fits is formed on the other side, and the fitting groove and the fitting protrusion are fitted to each other. A motor drive bell characterized in that the position of the striking rod in the axial direction is adjusted by slidingly moving the motor case with respect to the housing.